STIS SMOV Science Report
September 17, 2009
STIS SMOV Status
•
•
All STIS SMOV observations complete as of September 6, 2009
Most STIS SMOV analysis complete
– Final superbias & super-dark reference files for SMOV period have
been delivered
– New CCD reference file delivered
• Readnoise, gain, and CTE parameters
– CCD TDS reference files delivered
• Time-dependent sensitivity corrections to flux calibration
•
Open issues in STIS SMOV analysis
– Waiting for additional Cycle 17 calibration observations to finalize
MAMA TDS updates
• Changes from pre-repair projections appear to be small
– Monitoring of NUV MAMA dark is being continued by cycle 17
calibration program 11857
– Detailed writeups still pending for most activities
STIS Activity
PropID
STIS SMOV Program Title
Analysis
Lead
Visits
Done
Total
Visits
STIS02
11347
STIS03
Status
Memory Load and Dump
BS
1
1
Complete
11348
Science Data Buffer Check
BS
3
3
Complete
STIS04
11349
Mechanism Mini-Functional
TW
1
1
Complete
STIS05
11399
CCD Anneal (two anneal iterations)
MW
6
6
Complete
STIS06
11382
CCD Functional
DL
4
4
Complete
STIS07
11404
CCD Dark & Bias Monitor
MW
90
105
Complete
STIS08
11383
Aperture Wheel & Lamp Functional
WZ
2
2
Complete
STIS09
11384
STIS-to-FGS Alignment
CP
1
1
Complete
STIS10
11385
CCD Spectral Format Verification
WZ
1
1
Complete
STIS11
11386
External Focus Check
CP
4
3+1
Complete
STIS12
11387
Corrector and Focus Alignment
CP
-
8
Contingency
STIS13
11388
CCD External Spectroscopic Quality
TG
1
1
Complete
STIS14
11400
CCD CTI Check
PG
1
1
Complete
STIS15
11401
CCD Spectroscopic Throughputs
DL
3
3
Complete
STIS16
11389
CCD Image and Pointing Stability
TG
1
1
Complete
STIS17
11350
FUV MAMA HV Recovery
TW
4
4
Complete
STIS18
11351
NUV MAMA HV Recovery
TW
4 (+2F)
4 (+2F)
Complete
STIS19
11390
FUV MAMA Dark Measure
CP
10
10
Complete
STIS20
11402
NUV Dark Monitor
CP
42(+3F)
20+52
Complete
STIS21
11391
FUV Optical Format Verification
WZ
2
2
Complete
STIS22
11392
NUV Optical Format Verification
WZ
2 (+2F)
2 (+2F)
Complete
STIS23
11393
FUV MAMA Spectroscopic Quality
TG
1
1
Complete
STIS24
11394
NUV MAMA Spectroscopic Quality
TG
1
1
Complete
STIS25
11403
MAMA Spectroscopic Throughputs
DL
3
3
Analysis being finalized
STIS26
11395
MAMA Image Stability
TG
2
2
Complete
NUV dark update
•
Post SM4 NUV dark current (black dots) much higher than expected
– model as “expected dark” + “something extra”
• Model as the “expected dark” (orange curve below) declining according to old
behavior + an extra component Ae-(ΔE/T) e-t/τ
• “extra” term appears to have stronger T dependence (ΔE ≈ 1.8 eV vs 1.5 eV)
• Plot below compares different e-folding times for extra component

τ =100 d (red) & τ = ∞ (blue)